Visits 2- 25 (3x/ week for 8 weeks) (Within 2 weeks of initial testing) The subjects will be seen at the Wirtz Sports Center exercise room. They will participate in 3 Wii balance board games: a marble game, a skiing game, and a bubble game. Each subject will stand on a balance board and participate in each of the 3 games for 10 minutes per game with 10 minutes rest in between each of the games, a total of 30 minutes of balance training time per session. Subjects will have a gait belt in place during the exercises, and will be supervised by a physical therapist or research assistant. Either the Physical therapist or Research Assistant will always be immediately next to the subjects during the training program. A balance bar will also be next to the subject if needed for balance.